The terminology for
injection molding defects is as follows:
Cracking
(common name: pull explosion; other names; broken buckle, cracked)
Definition: A crack in the plastic part that is locally affected by pressure, external force or environmental influence on the surface or inside of the plastic part.
2. Surface protrusion
Technical term: None (common name: surface protrusion; other names: top height, convex height, drag height)
Definition: The high part of the plastic part is caused by the out-of-mold or the ejector pin and the top plate acting on the surface of the plastic part.
3. Warpage
(common name: deformation; other names: none)
Definition: Partial or overall deformation of a plastic part caused by internal stress.
4. Bubble
(common name: bubble; other: blistering, bubble)
Definition: A bubble-like defect formed in the interior or surface of a plastic part due to residual air or other gases.
5. Weld marks
(common name: water mark; other names: clip line, engraved)
Definition: During the injection molding process, when the two streams meet, the traces of the world surface are not completely fused.
6. Sink marks
(common name: shrinking; other names: none)
Definition: When the plastic parts are cooled and solidified in the cavity, the plastic parts are recessed due to uneven wall thickness, insufficient injection pressure, insufficient cooling time and the like.
7. Air grain
Technical term: None (common name: gas pattern; other name: none)
Definition: Due to the injection mold structure, molding process and materials, etc., the flow of material generated on the surface of the plastic part caused by the pressure and flow velocity of the plastic in the cavity.
8. Flower
Technical term: None (common name: material flower; other name: flushing)
Definition: Silver-white stripes formed on the surface of plastic parts by low molecular volatiles, moisture and other gases.
9. White stamp
(common name: whitish; other names: white, white, high)
Definition: The plastic part is partially affected by external pressure, which causes some molecular structures to be rearranged or broken, causing partial white printing on the surface of the plastic part.
10. Noise points
(common name: black dot; other names: spots, grams, stamp)
Definition: Because the raw material is mixed with foreign matter or the local temperature is too high during the molding process, the rubber is carbonized, so that the plastic part forms a spot on the surface after molding.
11. Die marks
Technical term: None (common name: die mark; other names: mold flower, stamp, mold injury)
Definition: Traces left on the surface of the injection mold due to scratches and bumps.
12. Poor glue
(common name: lack of glue; other names: none)
Definition: The plastic parts are partially dissatisfied and do not meet the design requirements.
13. Uneven color
(common name: mixed color; other names: none)
Definition: Defects in the uneven color of the surface of plastic parts.
14. Layering
(common name: layering; other names: peeling)
Definition: Defects in separation between layers.
15. Concede
(common name: plugging holes; other names: blind holes)
Definition: The hole position of the plastic part is blocked by more than 50% due to the cloak or broken needle.
16. Color does not match
(common name: color difference; other names: color depth / light, poor gloss)
Definition: The color and gloss of plastic parts do not match the standard board.
17. Multi-glue
Technical term: None (common name: multi-glue; other names: none)
Definition: Due to the lack of molding surface of the injection mold, etc., the plastic parts are partially glued out.
18. Charred
Technical term: None (common name: burnt; other names: burnt yellow, burnt black)
Definition: The local high temperature caused by the poor injection molding die, causing the plastic material to degrade to form a burnt shape; or due to the high shear rate of the rubber during the flow process, it will degrade and form a burnt shape.
19. White point
Technical term: None (common name: white point; other name: white mark)
Definition: White spots or white marks formed on the surface of plastic parts due to the poor quality of the toner, the film left in the thimble when it is clamped, and the metal inside the material.
20. Fish scales
Technical term: None (common name: fish scales; other names: none)
Definition: A fish scale pattern formed on a plastic part due to a low mold temperature and a slow glue injection speed.
21. Rubber wire
Technical term: None (common name: glue; other name: offset)
Definition: Due to the high temperature of the nozzle and the large back pressure, the wire-like rubber is pulled out during the die-laying, and is attached to the cavity, and the wire is formed on the surface of the product when the beer is produced.
22. Sticky mode
Technical term: None (common name: sticking mold; other name: viscose)
Definition: Due to the large injection pressure and small drafting angle, the plastic part is partially broken and left in the injection mold when the mold is released.
23. Missing watermark
Technical term: None (common name: watermark leakage; other names: none)
Definition: Due to the leakage of the injection mold water channel, water droplets and water marks are not removed in the injection mold, and traces are formed on the surface of the plastic part when the beer is produced.
24. Ghosting
Technical term: None (common name: ghosting; other names: none)
Definition: Due to low injection temperature, unsaturated plastic parts, product deformation, etc., the phenomenon of light and shadow overlap occurs during light transmission test.
25. Break
Technical term: None (common name: break; other names: none)
Definition: refers to the unevenness of the surface formed by the fittings.
26. Separation
Technical term: none (common name: from seam; other name: none)
Definition: Refers to the distance between the fittings after fitting (excluding the design process tank).
27. Large size
Technical term: None (common name: large size; other names: long size)
Definition: Due to the short injection time, the tight holding time, the inconsistent shrinkage rate of raw materials, etc., the size of the plastic parts is larger than the required size.
28. Small size
Technical term: None (commonly known as: small size; other names: short size) due to small injection pressure, short holding time, and inconsistent raw material shrinkage, resulting in a smaller plastic part size than the size.
29. Poor assembly
Technical term: None (common name: poor assembly; other names: try tight/loose, tight/loose, noisy)
Definition: Among the various components that cooperate with each other, there are problems of large size and small size, which causes tightness, looseness, noise, etc. during trial assembly. Such problems are collectively referred to as poor assembly.
30. Column explosion
Technical term: None (common name: pillar explosion; other names: none)
Definition: The studs burst or become violent when the screws are screwed.
31. Sliding teeth
Technical term: None (common name: slippery; other names: none)
Definition: Do not press the screw when the torque is specified.
32. Poor packaging
Technical term: None (common name: poor packaging; other names: mixed, short, packaged rotten)
Definition: Mixed, short-loaded, broken plastic bags, broken carton, damp, no support, not used packaging materials as required, packaging failures such as packaging and placement according to packaging methods.
33. Pulling hair
(common name: tow flower; other names: none)
Definition: A matte, non-depth trace of the surface of a plastic part due to slight mechanical friction.
34. Trauma
Technical term: None (common name: dragging; other names: none)
Definition: A significant flaw on the surface or inside of a plastic part due to a small draft or a rough cavity.
35. Scratch
Technical term: None (common name: touch scratch; other names: bruises, scratches, scratches, wipes)
Definition: A visible flaw caused by collision or squeezing between plastic parts or outside.
36. Fingerprints
Technical term: None (common name: finger print; other name: none)
Definition: A mark produced when a finger touches the surface of a product due to oily or sweaty fingers.
37. Oil stains
Technical term: None (common name: oil stain; other names: oil stains, oil stains)
Definition: The oil stain attached to the surface of the product can be washed away.
38. Mime printing
Technical term: None (common name: mimeograph; other names: oil flower, oil mark)
Definition: The irregular marks formed by the release agent, anti-rust oil and the like attached to the surface of the product during the molding process, affecting the gloss of the product or forming oil spots.
39.
Technical term: None (common name: shawl; other name: shawl)
Definition: Disadvantages such as wearing plastic parts, blistering, and draping teeth during processing.
40. Scratch
Technical term: None (common name: cut; other name: none)
Definition: Inadvertently cut the plastic parts when working with the cutting pliers.
41. Grinding bad
Technical term: None (common name: sanding bad; other name: sanding flower)
Definition: The phenomenon of grinding, grinding and other plastic parts during grinding.
42. Bad edge
Technical term: None (common name: poor crimping; other names: none)
Definition: The pressure is wide, the wave is felt when the edge is pressed, or some parts are not pressed.
43. Blowing
Technical term: None (common name: blown; other name: blown)
Definition: Poor plastic parts caused by blowing.
44. Screw mounted
Technical term: None (common name: screw installed reverse; other name: none)
Definition: It is reversed and fixed in the product after molding after being reversed during injection molding.
45. High mouth
Technical term: None (common name: high mouth; other name: none)
Definition: The phenomenon that the water level is higher due to poor processing or leakage processing.
46. The depth of the mouth
Technical term: None (common name: deep mouth; other names: none)
Definition: The phenomenon of water level depression caused by poor processing or poor molding process.
47. There is a hole in the mouth
Technical term: None (common name: there is a hole in the mouth; other names: none)
Definition: The phenomenon of water hole perforation caused by poor processing or poor forming process.
